Cosmogenic Radionuclides in the Bondoc Meteorite

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Science  25 Jun 1965:
Vol. 148, Issue 3678, pp. 1716-1717
DOI: 10.1126/science.148.3678.1716


Long-lived cosmogenic radionuclides were measured in the stone phase and in a mechanically separated metallic nodule from a fragment of the Bondoc mesosiderite. Activity levels of the various radionuclides in both phases, along with results of mass-spectrometric measurements of rare-gas isotopes in the stone phase, indicate that heavy shielding was the chief cause of the low specific activities observed.